change MCContext to work on the doInitialization/doFinalization model

reviewed by Evan Cheng <evan.cheng@apple.com>

llvm-svn: 169456

2 files changed, 36 insertions, 6 deletions

diff --git a/llvm/lib/CodeGen/MachineModuleInfo.cpp b/llvm/lib/CodeGen/MachineModuleInfo.cpp
index 4fbbb05ee6b..c5fd4a17c27 100644
--- a/llvm/lib/CodeGen/MachineModuleInfo.cpp
+++ b/llvm/lib/CodeGen/MachineModuleInfo.cpp
@@ -270,6 +270,9 @@ MachineModuleInfo::~MachineModuleInfo() {
 }
 
 bool MachineModuleInfo::doInitialization(Module &M) {
+  
+  Context.doInitialization();
+
   ObjFileMMI = 0;
   CompactUnwindEncoding = 0;
   CurCallSite = 0;
@@ -291,6 +294,8 @@ bool MachineModuleInfo::doFinalization(Module &M) {
   delete AddrLabelSymbols;
   AddrLabelSymbols = 0;
 
+  Context.doFinalization();
+
   return false;
 }
 
diff --git a/llvm/lib/MC/MCContext.cpp b/llvm/lib/MC/MCContext.cpp
index dd9d956088a..cd95b1161a8 100644
--- a/llvm/lib/MC/MCContext.cpp
+++ b/llvm/lib/MC/MCContext.cpp
@@ -44,23 +44,48 @@ MCContext::MCContext(const MCAsmInfo &mai, const MCRegisterInfo &mri,
   SecureLogFile = getenv("AS_SECURE_LOG_FILE");
   SecureLog = 0;
   SecureLogUsed = false;
+}
+
+MCContext::~MCContext() {
+  // NOTE: The symbols are all allocated out of a bump pointer allocator,
+  // we don't need to free them here.
+  
+  // If the stream for the .secure_log_unique directive was created free it.
+  delete (raw_ostream*)SecureLog;
+}
+
+//===----------------------------------------------------------------------===//
+// Module Lifetime Management
+//===----------------------------------------------------------------------===//
 
+void MCContext::doInitialization() {
+  NextUniqueID = 0;
+  AllowTemporaryLabels = true;
   DwarfLocSeen = false;
   GenDwarfForAssembly = false;
   GenDwarfFileNumber = 0;
 }
 
-MCContext::~MCContext() {
-  // NOTE: The symbols are all allocated out of a bump pointer allocator,
-  // we don't need to free them here.
+void MCContext::doFinalization() {
+  UsedNames.clear();
+  Symbols.clear();
+  Allocator.Reset();
+  Instances.clear();
+  MCDwarfFiles.clear();
+  MCDwarfDirs.clear();
+  MCGenDwarfLabelEntries.clear();
+  DwarfDebugFlags = StringRef();
+  MCLineSections.clear();
+  MCLineSectionOrder.clear();
+  CurrentDwarfLoc = MCDwarfLoc(0,0,0,DWARF2_FLAG_IS_STMT,0,0);
 
   // If we have the MachO uniquing map, free it.
   delete (MachOUniqueMapTy*)MachOUniquingMap;
   delete (ELFUniqueMapTy*)ELFUniquingMap;
   delete (COFFUniqueMapTy*)COFFUniquingMap;
-
-  // If the stream for the .secure_log_unique directive was created free it.
-  delete (raw_ostream*)SecureLog;
+  MachOUniquingMap = 0;
+  ELFUniquingMap = 0;
+  COFFUniquingMap = 0;
 }
 
 //===----------------------------------------------------------------------===//